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(No Model.) 2 She'ejas-Shet .1;

A. E. HOBSON. HYDRAULIC SHAPING. PRESS.

42. Patented Apr. Fiy..,.

'. INVENTOR:

*1 W wig ATTORNEYS.

N. Prrzns, Pmln-Lilhagnphnr, Washington. n.c.

(No Model.) 2 Sheets-'Sheet. 2 A. E HOBSON. V

HYDRAULIC SHAPING PRESS; N0. 3 8L 24 ZP'. W 7% Patented Ap x I v INVENTOR:-

' ATTORNEYS. v

, UNIT D STATES IPIATENTOEFICE? V RTH R E. noBsoN, OF HARTFORD, CONNECTICUT, ASSIGNOR or ON -HALE 1 To all whom it mag concern; I

flO I. J. STEANE & o., or SAME. PLACE.

HYDRAULIC"SHAPl N G-PRESS. Y

SPECIFICATION forming part of Letters Patent No. 381,242, dated April 17, 18 88. 'Application filed December 17, rear. stratum-258,153. (No model.)

Be it knownthat I, ARTHUR E, HoBsoN, of Hartford, in the county of Hartford and State of Connecticut, have invented anew and Improved Hydraulic Shaping-Press, of 'which the following is a full, clear, and exact de-" scriptionr This inventionrelates to hydraulic presses,

the object of the invention being to provide a press by meansof which embossed-faced articles may be produced, the invention consisting, essentially, of a means for clamping a flange formed at the edge of the blank directly to the upper edge of. the die, the press being provided with a means for raising the die from its holder or case, and prei'erablywith a means for drawing theblank,all as will be hereinafter more fully described, and specifically pointed out in the claims. 7

Reference is to be had to the accompanying drawings, forming a part of this specification, "1n .whlch similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a central sectional elevation of my improved form of shaping-machine. Fig. 2 is a sectional planview taken on line x of Fig. 1. Fig. 3'is a sectional plan view taken on line 3 y of Fig. 1, simply the die-holder and its connections being shown in this view'.; Flg. 41s a cross-sectional view of a modified form of head-block, and Fig. 5 is a similar view of astillfurther modification.

. In constructingsuch apress as the one form; ing the subject-matter of this 1 application I provide a main cylinder, 10, in which there is mounted a ram, 11, that carries a bed-plate, 12, upon which there is secured a-die-holder, 13, the bed-plate being guided by vertical columns 14, which carry an upper plate, 15, to

which there is connected a head-block, 30. In the bottom of thedie-holder 13, I mount a wedge-shaped plate, 16, that is centrally guided by a pin, 17, thispla'te being provided with a lever arm or handle, 18, which extends outward through the die-holder.

. The die is madein two or more sections,"

and these sections are placed directly upon the wedge-shaped plate 1 6 withinthe holder 13, the arrangement being such that when it is desired to remove the die-sections said sec- ;being formed with projections 24, which enter the recesses 23 at the time when the plate 22.

is being placed in position. After-the plate communication with the water-supply pipe I tions maybe slightly raised by turning the handle 18,, as will be readily understood from,

the construction shown.

The holder 13-is formed with ashoulder, 21, 55.

which is arranged upon a level with the upper edges of the dies, and upon this shoulder there is placed a plate,.22, formed with recesses 23in its peripheral face, said recesses being formed in order that the plate maybe placed upon the shoulder 21, the die-holder has been placed upon the shoulder21, it is turned by means of alever arm orhandle, 25, so that the upper faces of the projections be tween the recesses 23 will pass beneath the 'projecti0ns'24 of thedie holder 13. Whenin. this position, the plate will act to hold'the blank b and prevent it'from. being wrinkled when drawn, as 'will bereadily understood. I

.The headblock carries a plunger, 31, in which there is formed a central bore, 32, and" lateral passages 33, the bore 32 being placedin direct communication with a water-supply pipe,- 34. Ordinarily there would be placed about the plunger '31 an annular ram,.35, of

block 30, said water-chamber also" being in 34. A branch pipe, 38, leads from the pipe 34, and this pipe 38 is connected with the cyl= inder 10, valves 39 andi40 being arrangedas illustrated. r l

The central. aperture in the plate 22 is of such size as to permit the annular ram .35 to pass downward aboutthe plunger 3i to a position such that it will bear directly'upon the edgeofthe blank after such blank has been,

. 9 upon the edge of the blank will force the un- I der side of the flange formed at the edge of. 'the' blank hard against the upper face of the" die, and thereby form a water-tightjoint, the v a drawn downwithin the die, and in so bearing;

metal of the blank b being softer than that from which the dies and the annular ram are formed.

Such a water-tightjointas has been described 1 cannotbe'obtained between 'two -hard-metal I surfaces.

Inoperation the blank from which the anti 1 05 which the water-chamber 36' is in the. headcle is to be formed is placed upon the die 20, being held to place by the plate 22, that is adjusted as above described. The valve 39 is then opened and the valve 40 closed, whereby the ram 11 will be raised and the plunger 31 will force the blank downward within the dies, the flange a of the blank I) being pressed at this time hard against the upper edge of the sectional die. After this has been done, water is admitted through the pipe 34 t the bore 32 of the plunger, passing thence downward to bear against the blank, forcing it outward against the die, the valve 39 at this time being closed. -After water has passed through the plunger 31 and partially shaped the blank, the ram is forced down, so that the plunger will be partially withdrawn from within the die. The valve 40 is then closed and the valve 39 opened, whereby the ram 11 will be raised, and in raising will cause the water within the blank to force said blank outward and cause it to conform accurately with the face of the die.

By arranging the flange a as above described a perfectly water-tight joint is produced, said joint being maintained when the upper ram is forcing the lower ram down or when the lower ram is brought to bear against the upper ram. In certain styles of work it will of course'be understood that, instead .of an upper ram and plunger, there might be a flat-faced head-block having a central bore or aperture, as shown in Fig. 5, or there might be a solid downwardlyextending ring surrounding the plunger, said. ring being rigidly connected to or made integral with the head-block, as shown in Fig. 4; but in practice I prefer the construction illustrated in Fig. 1, as by means of such construction I am able to maintain a water-tight joint between the upper edge of the die and the blank-flange, even though the supply of water be cut off from the lower ram and the full force of the pumps be directed to the foreing of water within the partially-formed vessel, for as the lower ram settles its downward motion will be followed by the upper ram, and the joint at the upper edge of the ram will be maintained.

After the blank has been pressed to the required form, the ram 11 is lowered, the plate 22 removed, andthe handle 18 turned to raise the sectional die and the formed blank contained therein, the blanksections being raised to an extent suificient to enable the operator to grasp and remove them from the press.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent- 1. In a hydraulic shaping-press, the combination, with a ram carrying a die-holder, of 6? bination, with a die-holder,.of an apertured head-block provided with a bearing-surface and arranged above the die-case, whereby the edges of the blank may be clamped to the upper face of the die, substantially as described.

3. In a hydraulic press, the combination, with a ram, of a die-holder carried thereby, an apertured plunger arranged to enter the dieholder, and a ring surrounding the plunger, substantially as described.

4. In a hydraulic press, the combination, with a ram, of a die-holder carried thereby, an apertured plunger, and an annular ram surrounding, said plunger, as and for the purpose stated.

5. The combination, with a ram, of a dieholder and a wedge-shaped block mounted within the holder, substantially as described.

6. The combination, with a ram, of a dieholder supported thereby, a wedge-shaped block mounted within the die-holder and provided witha downwardly-extending pin, and an outwardly-extending lever arm or handle, substantially as described.

7. ,The combination, with a ram, of a dieholder carried thereby, dies adapted to fit said holder, a blank-holding plate arranged to fit within the die-holder above the die, and a head block provided with a centrally-apertured plunger that is in connection with a watersupply, substantially as described.

8. The combination, with a ram, of a dieholder, 13, dies 20, mounted therein, a plateholder, 22, a head-block, a plunger, 31, supported thereby and formed with a bore, 32, a ram, 35, mounted about the plunger, and a water-supply, substantially as described.

ARTHUR E. HOBSON.

Witnesses:

HIRAM R. MILLs, EDWARD S. WHITE. 

